CVE-2026-89091

CVE Enrichment

CVSS: 8.8 HIGH
EPSS: 0.48%
EPSS Percentile: 39.68%
CISA KEV: Not listed

Description

A flaw was found in ansible-core. When installing a collection with `ansible-galaxy collection install`, the archive extractor validates member paths using lexical path normalisation (os.path.abspath) instead of resolving symbolic links (os.path.realpath), and it performs no containment check on symlink-typed directory members before creating them. A crafted collection tarball can chain symlink directory entries so that a subsequent file member is written outside the intended destination directory. This allows an attacker who can get a victim to install a malicious collection to overwrite arbitrary files with the privileges of the user running ansible-galaxy, leading to code execution on the control node. This is a bypass of the fix for CVE-2020-10691.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: secalert@redhat.com
Published: 09-Oct-2026 05:17
Last Modified: 09-Oct-2026 23:37
EPSS Date: 2026-10-13
CWE: CWE-59

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:R /
                            S:U /
                            C:H /
                            I:H /
                            A:H

References

Last enrichment sync: 14-Oct-2026 20:54
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-89091 Microsoft October 2026 Updates Fix 1,411 Flaws, Including Three Zero-Days

CVE (1235)

People (2)

MITRE ATT&CK (1)

Vendors (14)

Products (87)

Tools (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.